Because your tamandua suddenly spotting blood can be frightening here's some photos of Pua's monthly(mostly) spotting. Average cycle is 45 days based on certain studies but Pua has always been 28-30 days most times but she is also often irregular.

For more info microscopic photos of tamandua anteater pre-estrus fluid

You can see blood cells in this though some look a little damaged(Echinocytes) since it was drying out and I used glass slides which also causes this. She wanted to play not cooperate.

The stuff I looked at before but hadn't taken a photo of was just epithelial cells, what gathers there in between her monthly spotting sometimes.